Greta is on the chairlift going up the mountain when one of her skis falls off. The ski has a mass of 5 kg and hits the snow below with a speed of 72 km/h.
How high is the chairlift above the snow when the ski falls off?
(Ignore air resistance.)

Give your answer to the nearest 0.1 m.

Use g = 9.8 m/s2 for the acceleration due to gravity.

Explanation:

We can use the following kinematics equation to find the height of the chairlift above the snow:

.

First, let's convert 72 km/h to m/s:

Since the ski starts with an initial vertical velocity of zero, we have . We can now substitute and solve for how high the chairlift is above the snow:

.

newton's first law of motion

continuous conducting path for current, power supply